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    jswope's Avatar
    jswope Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 5, 2007, 06:10 AM
    Running 2 heat systems depending on outside temp
    I have a Train heat pump and a Lenox hot water heat in our home. The heat pump works well above 40 degrees but I keep having to manually switch back and forth from one to the other. Is there a way to do this automatically?
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #2

    Jan 5, 2007, 06:58 AM
    Many thermostats are set up to handle 2 different heating rtes, and heat pump thermostats have the AUX setting. You will need an outside temperature sensor to make the switch depending on the temperature and a thermostat with an input for it. I can't give you a brand or model.
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #3

    Jan 5, 2007, 01:49 PM
    Yes it is called a low ambient switch. Many Trane units come equipped this way, they call it restricted mode. The wiring isn't to difficult but I would say you should maybe call a pro, a new thermost wire ran to the outside unit may be required.
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